Mine truck does the same with the A/C on full blast. When the cooling fan kicks in, it drops the voltage but not as bad as before. That appears to be normal operation.
Nathan,
I do Fire & EMS with my 08 Chevy Truck and have been having a lot of issues with this system while attempting to transmit on my radio. Today I finally researched this and found this thread. I unplugged the sensor and it appears to be working perfectly for me. I realize this thread is...
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